論文

査読有り
2016年

Performance evaluation of micro rain radar over sumatra through comparison with disdrometer and wind profiler

Progress In Electromagnetics Research M
  • Marzuki
  • ,
  • Hiroyuki Hashiguchi
  • ,
  • Toyoshi Shimomai
  • ,
  • Indah Rahayu
  • ,
  • Mutya Vonnisa
  • ,
  • Afdal

50
開始ページ
33
終了ページ
46
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.2528/PIERM16072808
出版者・発行元
Electromagnetics Academy

Micro Rain Radar (MRR) is a vertical pointing microwave profiler to measure hydrometeors and related parameters in high resolution. However, it is known that the MRR suffers from certain limitations due to several factors. This paper evaluates the performance of the MRR installed at Kototabang, west Sumatra, Indonesia (0.20◦S, 100.32◦E, 864m above sea level). The DSD and rainfall rate from the MRR standard processing method had been evaluated by using collocated measurements of MRR, Parsivel disdrometer and Optical Rain Gauge (ORG) during 2014. Furthermore, 1.3GHz wind profiler (BLR) observation was used to examine the vertical profiles of radar reflectivity and Doppler velocity. It was found that there were noticeable differences between the MRR and Parsivel in the small and large size ends of the DSD. At small sized drop (&lt
1mm), the DSD spectra of MRR was higher than that obtained by the Parsivel otherwise it was smaller for large sized drop (&gt
2mm). Underestimation of large sized drops in the MRR could be responsible for the underestimation of surface rainfall rate and daily rainfall. The source of differences in the DSD seems the measurement shortcomings such as attenuation correction and vertical wind effects, particularly during heavy rain. The shortcomings were observed from the comparison of mean Doppler velocity profiles between the MRR and the BLR. While the melting layer height of the two instruments was the same, the mean Doppler velocities of MRR shown downward increasing (DI) pattern through all rainfall intensities. On the other hand, for the BLR, the DI was only observed for heavy rain (&gt
10mm/h), while downward decreasing was observed for light rain (&lt
5mm/h). Similar pattern was also observed for the vertical profile of radar reflectivity. Thus, some corrections are needed for heavy rain, nevertheless, the MRR installed at Kototabang can be utilized for light rain. Comparisons indicated that the mean Doppler velocity and the DSD for the light rain as well as Z-R relation were in reasonable agreement with the reference of BLR, Parsivel and previous studies using the MRR.

リンク情報
DOI
https://doi.org/10.2528/PIERM16072808
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000410506100004&DestApp=WOS_CPL
ID情報
  • DOI : 10.2528/PIERM16072808
  • ISSN : 1098-8963
  • ISSN : 1937-8726
  • SCOPUS ID : 84988589127
  • Web of Science ID : WOS:000410506100004

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